Cube shelf



FIG. 1 is a perspective view of a cube shelf showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a perspective view of an alternative embodiment thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a right side view thereof, the opposite side being a mirror image of the side shown.

The broken line showing the inside of the cube shelf is included for the purpose of illustrating environment and forms no part of the claimed design. 

The ornamental design for a cube shelf, as shown and described. 